Abstract
The present study deals with the replacement to the absorber material of a conventional Solar Thermal Flat Plate collector by a low cost zero emission naturally available material. Here the emphasis is on reducing the emission that is generated while excavating and fabricating the absorber material for the flat plate collectors (FPC) by replacing it with a naturally available material without sacrificing much on the performance of the collector. Also, since the proposed material is directly used in its natural form without much modification, its cost is much less than that of the cost of the absorber of a conventional FPC. This reduces the overall cost of the FPC with the replaced absorber. The natural material proposed are the pebbles which are extensively used in solar energy storage systems because of their high heat absorbing capacity but have never been used as the absorber material in a FPC. Thus, this is an endeavor to replace and study the performance of a FPC with the proposed pebble absorber with and without coating of the pebbles and comparing the same with that of a conventional FPC using the conventional Copper absorber. During the study it is evident that the proposed coated pebble absorber is as good as that of a conventional absorber thus making it a cheap and nonpolluting alternative to the costly polluting absorber of a conventional FPC.
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